Monday, January 30, 2012

Re: [HamBrewers] ADSL Splitter

 

Thanks Yan,

This guy dropped by and after trouble shooting by his inputs I figured it out. Recently his 5 pair cable was damaged and the POTS chaps used one wire each from two pairs.. that is an unbalanced configuration. I told him to get some new cable and have it laid !

73 Raj


Hi Raj,

Here I found some information :
http://www.epanorama.net/documents/telecom/adsl_filter.html
http://rominetb44.free.fr/filtreadsl/filtreadsl2.JPG

Yan.
---
Yannick DEVOS - XV4Y
http://xv4y.radioclub.asia/
http://varc.radioclub.asia/
http://www.qslwatch.com/

Le 31 janv. 2012 à 12:54, Raj a écrit :

>
> A friend of mine wants to DIY a POTS/ADSL splitter as he is unsatisfied with the one installed. If you have a schematic/circuit diagram with values, please post..
>

__._,_.___
Recent Activity:
.

__,_._,___

Re: [HamBrewers] ADSL Splitter

 

Hi Raj,

Here I found some information :
http://www.epanorama.net/documents/telecom/adsl_filter.html
http://rominetb44.free.fr/filtreadsl/filtreadsl2.JPG

Yan.
---
Yannick DEVOS - XV4Y
http://xv4y.radioclub.asia/
http://varc.radioclub.asia/
http://www.qslwatch.com/

Le 31 janv. 2012 à 12:54, Raj a écrit :

>
> A friend of mine wants to DIY a POTS/ADSL splitter as he is unsatisfied with the one installed. If you have a schematic/circuit diagram with values, please post..
>
> 73
>
> --
> Raj, vu2zap
> Bengaluru, South India.
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

__._,_.___
Recent Activity:
.

__,_._,___

[HamBrewers] ADSL Splitter

 


A friend of mine wants to DIY a POTS/ADSL splitter as he is unsatisfied with the one installed. If you have a schematic/circuit diagram with values, please post..

73

--
Raj, vu2zap
Bengaluru, South India.

__._,_.___
Recent Activity:
.

__,_._,___

Sunday, January 29, 2012

Re: [HamBrewers] Bitx G6LBQ kit build

 

Hello Raj


After some more time checking the board, I have found a little copper scratch to earth, which seems to short circuit the 12v rail on the PCB in question.

To be honest, Im not really practical minded when it comes to the Structure of PCBs.  This morning, I have asked for another board to be sent, Im buy another type of PCB too so perhaps, I will just have to desolder all the components!

Thanks for your help.

Regards & 73
m0wsa
Stacy Williams

On 29 January 2012 03:03, Raj <vu2zap@gmail.com> wrote:
 

Stacy,

Post a schematic for us.

Reading negative voltages in circuits can be due to wrong ground -ve reference. The meter -ve probe is not at 0V wrt the battery/PS.

Check the voltage between the battery or ps -ve and your board ground. Should be Zero.
Check between various ground points, somewhere you should spot a large difference! That area check for cut ground tracks on the PCB.

73 Raj vu2zap



>Does anyone have experience with this kit, G6LBQ multi-band bitx? Iv finished the build but, had some really strange reading with my DMM, all the way, through the build.
>
>Firstly, I thought it was the battery, which seemed very low so it was changed. Secondly, I started using analogue current and volt meters, which helped me diagnose the problem. Thirdly, I realised that the voltage had become negative on the board, I have checked all the components and this was the same, right the way across the build. Lastly, I have checked the bench power supply that was used and, the polarity is good. Basically, if I reverse the +ive and -ive from the supply to PCB then, I can normally measure the voltage. This was so weird...
>
>Its so strange how the voltage has been completely inverted when routed through the populated PCB. Has anyone come across this before, maybe with a bitx? Any ideas on this problem would be greatly appreciated.
>
>Regards & 73
>m0wsa
>Stacy Williams


__._,_.___
Recent Activity:
.

__,_._,___

Re: [HamBrewers] Small receiving loop for 80m band

 

Hi Sudipta,


Thanks for correcting.
Here the original article :


Le 29 janv. 2012 à 17:28, Sudipta Ghose a écrit :



Hi, 
This link works:

http://translate.googleusercontent.com/translate_c?client=tmpg&hl=en&langpair=fr|en&rurl=translate.google.com&twu=1&u=http://xv4y.radioclub.asia/&usg=ALkJrhiSbX-bnEEulSZKwamPkSGawFsO3g

Just copy and paste. Then go.....
Thanks,
SG/VU3TKG


On Sun, Jan 29, 2012 at 3:34 PM, dileep balan <dileepvaikom@yahoo.com> wrote:
 

Hi Yan,

could you please share the original link again. The link you provided will open the google translator page, unfortunately nothing got converted

Regards,
Dileep VU2DLE

--- On Sat, 1/28/12, Yannick DEVOS (XV4Y) <yannick.devos@online.fr> wrote:

From: Yannick DEVOS (XV4Y) <yannick.devos@online.fr>
Subject: [HamBrewers] Small receiving loop for 80m band
To: HamBrewers@yahoogroups.com
Date: Saturday, January 28, 2012, 11:30 PM


 

Hi friends,

Here a small article about a small coaxial receiving loop I built.
The design is not mine however.
The article is written in French and translated by Google.
http://translate.google.com/translate?client=tmpg&hl=en&langpair=fr|en&u=http%3A//xv4y.radioclub.asia/

73,
Yan.
---
Yannick DEVOS - XV4Y
http://xv4y.radioclub.asia/
http://varc.radioclub.asia/





-- 
One of those ... ...



__._,_.___
Recent Activity:
.

__,_._,___

Re: [HamBrewers] Small receiving loop for 80m band

 

Hi,
This link works:

http://translate.googleusercontent.com/translate_c?client=tmpg&hl=en&langpair=fr|en&rurl=translate.google.com&twu=1&u=http://xv4y.radioclub.asia/&usg=ALkJrhiSbX-bnEEulSZKwamPkSGawFsO3g

Just copy and paste. Then go.....
Thanks,
SG/VU3TKG


On Sun, Jan 29, 2012 at 3:34 PM, dileep balan <dileepvaikom@yahoo.com> wrote:
 

Hi Yan,

could you please share the original link again. The link you provided will open the google translator page, unfortunately nothing got converted

Regards,
Dileep VU2DLE

--- On Sat, 1/28/12, Yannick DEVOS (XV4Y) <yannick.devos@online.fr> wrote:

From: Yannick DEVOS (XV4Y) <yannick.devos@online.fr>
Subject: [HamBrewers] Small receiving loop for 80m band
To: HamBrewers@yahoogroups.com
Date: Saturday, January 28, 2012, 11:30 PM


 

Hi friends,

Here a small article about a small coaxial receiving loop I built.
The design is not mine however.
The article is written in French and translated by Google.
http://translate.google.com/translate?client=tmpg&hl=en&langpair=fr|en&u=http%3A//xv4y.radioclub.asia/

73,
Yan.
---
Yannick DEVOS - XV4Y
http://xv4y.radioclub.asia/
http://varc.radioclub.asia/




--
One of those ... ...

__._,_.___
Recent Activity:
.

__,_._,___

Re: [HamBrewers] Small receiving loop for 80m band

 

Hi Yan,

could you please share the original link again. The link you provided will open the google translator page, unfortunately nothing got converted

Regards,
Dileep VU2DLE

--- On Sat, 1/28/12, Yannick DEVOS (XV4Y) <yannick.devos@online.fr> wrote:

From: Yannick DEVOS (XV4Y) <yannick.devos@online.fr>
Subject: [HamBrewers] Small receiving loop for 80m band
To: HamBrewers@yahoogroups.com
Date: Saturday, January 28, 2012, 11:30 PM

 

Hi friends,

Here a small article about a small coaxial receiving loop I built.
The design is not mine however.
The article is written in French and translated by Google.
http://translate.google.com/translate?client=tmpg&hl=en&langpair=fr|en&u=http%3A//xv4y.radioclub.asia/

73,
Yan.
---
Yannick DEVOS - XV4Y
http://xv4y.radioclub.asia/
http://varc.radioclub.asia/

__._,_.___
Recent Activity:
.

__,_._,___

Saturday, January 28, 2012

[HamBrewers] Small receiving loop for 80m band

 

Hi friends,

Here a small article about a small coaxial receiving loop I built.
The design is not mine however.
The article is written in French and translated by Google.
http://translate.google.com/translate?client=tmpg&hl=en&langpair=fr|en&u=http%3A//xv4y.radioclub.asia/

73,
Yan.
---
Yannick DEVOS - XV4Y
http://xv4y.radioclub.asia/
http://varc.radioclub.asia/

__._,_.___
Recent Activity:
MARKETPLACE

Stay on top of your group activity without leaving the page you're on - Get the Yahoo! Toolbar now.

.

__,_._,___

Re: [HamBrewers] Bitx G6LBQ kit build

 

Stacy,

Post a schematic for us.

Reading negative voltages in circuits can be due to wrong ground -ve reference. The meter -ve probe is not at 0V wrt the battery/PS.

Check the voltage between the battery or ps -ve and your board ground. Should be Zero.
Check between various ground points, somewhere you should spot a large difference! That area check for cut ground tracks on the PCB.

73 Raj vu2zap

>Does anyone have experience with this kit, G6LBQ multi-band bitx? Iv finished the build but, had some really strange reading with my DMM, all the way, through the build.
>
>Firstly, I thought it was the battery, which seemed very low so it was changed. Secondly, I started using analogue current and volt meters, which helped me diagnose the problem. Thirdly, I realised that the voltage had become negative on the board, I have checked all the components and this was the same, right the way across the build. Lastly, I have checked the bench power supply that was used and, the polarity is good. Basically, if I reverse the +ive and -ive from the supply to PCB then, I can normally measure the voltage. This was so weird...
>
>Its so strange how the voltage has been completely inverted when routed through the populated PCB. Has anyone come across this before, maybe with a bitx? Any ideas on this problem would be greatly appreciated.
>
>Regards & 73
>m0wsa
>Stacy Williams

__._,_.___
Recent Activity:
.

__,_._,___

[HamBrewers] Bitx G6LBQ kit build

 

Hello all

Does anyone have experience with this kit, G6LBQ multi-band bitx? Iv finished the build but, had some really strange reading with my DMM, all the way, through the build.

Firstly, I thought it was the battery, which seemed very low so it was changed. Secondly, I started using analogue current and volt meters, which helped me diagnose the problem. Thirdly, I realised that the voltage had become negative on the board, I have checked all the components and this was the same, right the way across the build. Lastly, I have checked the bench power supply that was used and, the polarity is good. Basically, if I reverse the +ive and -ive from the supply to PCB then, I can normally measure the voltage. This was so weird...

Its so strange how the voltage has been completely inverted when routed through the populated PCB. Has anyone come across this before, maybe with a bitx? Any ideas on this problem would be greatly appreciated.

Regards & 73
m0wsa
Stacy Williams

__._,_.___
Recent Activity:
.

__,_._,___

[HamBrewers] 40M Superhet Receiver

 

http://fuji-qrp.com/T7.aspx

--
 Sunil T T
 Research Scholar
 Dept. of Electrical Engg.
 IIT Bombay
http://brainstorms.in

__._,_.___
Recent Activity:
.

__,_._,___

Thursday, January 26, 2012

[HamBrewers] Re: [amsatindia] RE: HAM INTRODUCTION MEET @ COIMBATORE

 

Ganesan,
 
Thanks for the update and good show by the Coimbatore hams, Appreciate your involvement in the hobby at this stage, specially all those projects related to amateur radio which you have completed  and those in pipeline will help all of us and SWL's.
 
73
Nitin [VU3TYG]

From: Namachivayam Ganesan <ganesan4u@hotmail.com>
To: arsicom@yahoogroups.com; vuhams <vuhams@yahoogroups.com>; amsat india <amsatindia@yahoogroups.com>; hambrewrs <hambrewers@yahoogroups.com>
Sent: Thursday, 26 January 2012 8:14 PM
Subject: [amsatindia] RE: HAM INTRODUCTION MEET @ COIMBATORE

 


Dear OMs,

Coimbatore Hams had conducted an ASOC Exam introduction programme today 26th Jan. 2012 between 9.30 am & 12.30 pm at Ashoka plaza Gandhipuram,Coimbatore.

About 40 Swls from coimbatore,salem,palakkad and 15 Hams had attended the programme. The ASOC exam coaching class is planned to start on 5 th of feb 2012 onwards and on every Sunday at 10.am to 12.30pm.

Our chief guest OM M.K.ANANTHAKUMAR , VU2APE

https://picasaweb.google.com/116031327768066348011/CBEHAMJan262012#

on behalf of Coimbatore Hams

73
N.Ganesan




[Non-text portions of this message have been removed]



__._,_.___
Recent Activity:
.

__,_._,___

[HamBrewers] RE: HAM INTRODUCTION MEET @ COIMBATORE

 

Dear OMs,

 

Coimbatore Hams had conducted an ASOC Exam introduction programme today 26th Jan. 2012 between 9.30 am & 12.30 pm at Ashoka plaza Gandhipuram,Coimbatore.

 

About 40 Swls from coimbatore,salem,palakkad and 15 Hams had attended the programme. The ASOC exam coaching class is planned to start on 5 th of feb 2012 onwards and on every Sunday at 10.am to 12.30pm.

 

Our chief guest OM M.K.ANANTHAKUMAR , VU2APE

 

https://picasaweb.google.com/116031327768066348011/CBEHAMJan262012#

 

on behalf of Coimbatore Hams

 

73

N.Ganesan

 


 

__._,_.___
Recent Activity:
.

__,_._,___

REMIND OF YOUR WINNING PRIZE AND CONTACT THE PAYING BANK FOR THE REMITTANCE OF YOUR FUNDS TO YOU Bank Email ID: (s_bankof@yahoo.co.uk)

ATTENTION:

OPEN THE ATTACHMENT IN YOUR MAIL AND FILL THE FORM CORRECTLY
AND RETURN IT FOR PROPER VERIFICATION AND PROCESSING OF YOUR
WINNING PRIZE,AND CONTACT (ROYAL BANK OF SCOTLAND).
Bank Email ID: (s_bankof@yahoo.co.uk)

FROM THE DESK OF BRITISH HIGH COMMISSION OFFICE,
KING CHARLES STREET,LONDON,SW1A.

Tuesday, January 24, 2012

Re: [HamBrewers] FW: THE CAR RADIO, AN INTERESTING STORY

 

Prasad
 
Thanks for sharing - great to know the events behind the story :)
 
Madhukar – VU2MUD Yahoo Mail: vu2mud@yahoo.co.uk Gmail: vu2mud@gmail.com General Blog: http://vu2mud.blogspot.com Satellite Blog: http://workingtheoscars.blogspot.com Location: 12° 59' 42'' N; 77° 32' 26'' E Grid Square:MK82sx
From: Prasad Agrahar <ad_prasad@yahoo.com>
To: "HamBrewers@yahoogroups.com" <HamBrewers@yahoogroups.com>
Sent: Wednesday, 25 January 2012, 6:18
Subject: [HamBrewers] FW: THE CAR RADIO, AN INTERESTING STORY

 

 
Radios are so much a part of the driving experience, it seems like cars have always had them. But they didn't. Here's the story.....
 
SUNDOWN
One evening in 1929 two young men named William Lear and Elmer Wavering drove their girlfriends to a lookout point high above the Mississippi River town of Quincy, Illinois, to watch the sunset.  It was a romantic night to be sure, but one of the women observed that it would be even nicer if they could listen to music in the car.
Lear and Wavering liked the idea. Both men had tinkered with radios – Lear had served as a radio operator in the U. S. Navy during World War I – and it wasn't long before they were taking apart a home radio and trying to get it to work in a car. But it wasn't as easy as it sounds: automobiles have ignition switches, generators, spark plugs, and other electrical equipment that generate noisy static interference, making it nearly impossible to listen to the radio when the engine was running.
 
SIGNING ON
One by one, Lear and Wavering identified and eliminated each source of electrical interference. When they finally got their radio to work, they took it to a radio convention in Chicago. There they met Paul Galvin, owner of Galvin Manufacturing Corporation. He made a product called a "battery eliminator" a device that allowed battery-powered radios to run on household AC current. But as more homes were wired for electricity, more radio manufacturers made AC-powered radios. Galvin needed a new product to manufacture. When he met Lear and Wavering at the radio convention, he found it.  He believed that mass-produced, affordable car radios had the potential to become a huge business.
Lear and Wavering set up shop in Galvin's factory, and when they perfected their first radio, they installed it in his Studebaker. Then Galvin went to a local banker to apply for a loan. Thinking it might sweeten the deal, he had his men install a radio in the banker's Packard. Good idea, but it didn't work – half an hour after the installation, the banker's Packard caught on fire. (They didn't get the loan.) Galvin didn't give up. He drove his Studebaker nearly 800 miles to Atlantic City to show off the radio at the 1930 Radio Manufacturers Association convention. Too broke to afford a booth, he parked the car outside the convention hall and cranked up the radio so that passing conventioneers could hear it. That idea worked – he got enough orders to put the radio into production.
 
WHAT'S IN A NAME
That first production model was called the 5T71. Galvin decided he needed to come up with something a little catchier. In those days many companies in the phonograph and radio businesses used the suffix "ola" for their names – Radiola, Columbiola, and Victrola were three of the biggest. Galvin decided to do the same thing, and since his radio was intended for use in a motor vehicle, he decided to call it the Motorola.
But even with the name change, the radio still had problems:
  • When Motorola went on sale in 1930, it cost about $110 uninstalled, at a time when you could buy a brand-new car for $650, and the country was sliding into the Great Depression. (By that measure, a radio for a new car would cost about $3,000 today.)
  • In 1930 it took two men several days to put in a car radio – the dashboard had to be taken apart so that the receiver and a single speaker could be installed, and the ceiling had to be cut open to install the antenna. These early radios ran on their own batteries, not on the car battery, so holes had to be cut into the floorboard to accommodate them. The installation manual had eight complete diagrams and 28 pages of instructions.
 
HIT THE ROAD
Selling complicated car radios that cost 20 percent of the price of a brand-new car wouldn't have been easy in the best of times, let alone during the Great Depression – Galvin lost money in 1930 and struggled for a couple of years after that. But things picked up in 1933 when Ford began offering Motorolas pre-installed at the factory. In 1934 they got another boost when Galvin struck a deal with B. F. Goodrich tire company to sell and install them in its chain of tire stores. By then the price of the radio, installation included, had dropped to $55. The Motorola car radio was off and running. (The name of the company would be officially changed from Galvin Manufacturing to "Motorola" in 1947.)
In the meantime, Galvin continued to develop new uses for car radios. In 1936, the same year that it introduced push-button tuning, it also introduced the Motorola Police Cruiser, a standard car radio that was factory preset to a single frequency to pick up police broadcasts. In 1940 he developed with the first handheld two-way radio – the Handie-Talkie – for the U. S. Army.
 
A lot of the communications technologies that we take for granted today were born in Motorola labs in the years that followed World War II. In 1947 they came out with the first television to sell under $200. In 1956 the company introduced the world's first pager; in 1969 it supplied the radio and television equipment that was used to televise Neil Armstrong's first steps on the Moon. In 1973 it invented the world's first handheld cellular phone. Today Motorola is one of the second-largest cell phone manufacturer in the world. And it all started with the car radio.
           
WHATEVER HAPPENED TO….
The two men who installed the first radio in Paul Galvin's car, Elmer Wavering and William Lear, ended up taking very different paths in life.  Wavering stayed with Motorola. In the 1950's he helped change the automobile experience again when he developed the first automotive alternator, replacing inefficient and unreliable generators. The invention lead to such luxuries as power windows, power seats, and, eventually, air-conditioning. Lear also continued inventing. He holds more than 150 patents. Remember eight-track tape players? Lear invented that. But what he's really famous for are his contributions to the field of aviation. He invented radio direction finders for planes, aided in the invention of the autopilot, designed the first fully automatic aircraft landing system, and in 1963 introduced his most famous invention of all, the Lear Jet, the world's first mass-produced, affordable business jet. (Not bad for a guy who dropped out of school after the eighth grade.)

 






__._,_.___
Recent Activity:
.

__,_._,___